21321033212013 has 8 divisors (see below), whose sum is σ = 29121411216576. Its totient is φ = 13867338674400.

The previous prime is 21321033211999. The next prime is 21321033212021. The reversal of 21321033212013 is 31021233012312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21321033212013 - 2⁶ = 21321033211949 is a prime.

It is a super-2 number, since 2×21321033212013² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21321033212053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86670866593 + ... + 86670866838.

It is an arithmetic number, because the mean of its divisors is an integer number (3640176402072).

Almost surely, 2^{21321033212013} is an apocalyptic number.

It is an amenable number.

21321033212013 is a deficient number, since it is larger than the sum of its proper divisors (7800378004563).

21321033212013 is a wasteful number, since it uses less digits than its factorization.

21321033212013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173341733475.

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 21321033212013 its reverse (31021233012312), we get a palindrome (52342266224325).

The spelling of 21321033212013 in words is "twenty-one trillion, three hundred twenty-one billion, thirty-three million, two hundred twelve thousand, thirteen".